of Arbaciidae, [532];
of Echinothuriidae, [532], [535];
of Colobocentrotus, [532];
of Heterocentrotus, [532];
of Echinocardium cordatum, [550]
Primnoa, [354];
P. lepadifera, [338]
Primnoidae, [330], [335], [354]
Pringsheim, on exogamy in Pandorina, [34] n.